Gas-lamp.



No. 748,363. PATENTED DEC. 29, 1903.

' I. GORDON.

GAS LAMP.

N0 MODEL.

ZINE-NORRIS VETERS 0o FHOTQLITHO WASHINGYON, n. c.

N TEn STATES Patented December 29, 1903.

PATENT Trice.

THOMAS GORDON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO JOSEPH J. SLEEPER, OF PHILADELPHIA, PENNSYLVANIA.

GAS-LAMP.

SPECIFICATION forming part of Letters Patent No. 748,363, dated December 1903- Application filed May 13, 1903.

To all whom it may concern:

Be it known that I, THOMAS GORDON, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsyl- Vania, have invented a new and useful Improvement in GasLamps, of which the following is a specification.

My invention relates to incandescent lamps.

It consists of means for introducing air under pressure and gas to the mixing-chamber of a burner and means for controlling the free air-supply to such burner.

It further consists of novel details of construction, all as will be hereinafter fully set forth.

Figure 1 represents a partial elevation and partial vertical section of a gas-lamp embodying my invention. Fig. 2 represents a top plan View of the fitting connecting the lower :0 ends of the gas and air tubes detached from the device.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings, 1 and 2 designate pipes leading downwardly from reservoirs (not shown) of gas and air under pressure. As shown, these tubes form the sides of a harp or lamp-suspending device and are connected at their lower ends by a fitting o 3, which provides separate passages 4: and 5 for the gas and air to the miXing-chamber-G of an ordinary incandescent burner 7. It will be seen in Fig. 2 that the passages 4 and 5 terminate in ports alined so that one of the fluids, as the air, is directed upward between the rising currents of the other fluid, as the gas. Above the burner 7 is supported a draftdivider or chimney 8. Surrounding the lower end of this chimney is a globe 9, supported in and filling the opening 10 in a holder 11, which may also serve to support a shade 12. The holder 11 serves as a base for a casing 13, which hasa plurality of apertures 14 surrounding the chimney 8 and a second ring of apertures 15 above the top of such chimney.

As shown, the apertures 14: and 15 are preferably cut in flanges or casing members 16 and l7,which extend outwardly and upwardly, so that the apertures are protected by the imperforate casing members immediately Serial. No. 156,870- (No model.)

due proportion being admitted to the tubes 1 and 2 and passing through the fitting 3 unite in the mixing-chamber 6. Their upward flow acts to draw in an additional supply of air through the usual lateral openings or windows in the burner 7. This free air is drawn through the apertures 14.- in the casing 13 and downward in the globe 9 by means of the upward draft of the products of combustion in the chimney 8-, such heated gases passing out of the upper apertures 15.

It will be' noted that the lower end of the draft-divider or chimney 8 is entirely above the zone of combustion-e. g., the incandescent mantlethat its upper end is below or in the plane of the exit-apertures 15, and that it is encircled by the air-admission aperture 14. As no air-currents are produced in the globe 9 by which the mantle can be injured, the usual translucent chimney is unnecessary, the tube 8 serving to separate the en tering downward air-currents from the escaping upward heated products of combustion. Among the advantages of my device are the perfect protection of an incandescent mantle from draft and from the weather, the equal preheating of the gas and air supplied to the chamber,'the intimate admixture of the gas and air, the regulation and steadying of the currents of free air admitted not only to the mixing-chamber, but as well to cool the globe, and the simplicity and economy of its construction.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A gas-lamp comprising a burner, a globe closed except at its upper end surrounding said burner, a casing above said globe having and extending above said air-admission aperture and not substantially above said gasexit aperture.

2. A gas-lamp comprising a burner, a globe closed except at its upper end surrounding said burner, a casing above said globe, an imperforate draft-divider in said casing above the zone of combustion, an air-admission aperture in said casing in a plane intermediate the ends of said divider and a gas-exit aperture in said casing substantially above said divider.

3. A gas-lamp comprising a burner, tubes adapted to convey gas and air under pressure to said burner, a globe surrounding said burner, means for the admission of free air adjacent the upper end of said globe and an imperforate draft-divider above the zone of combustion and extending upward out of said globe.

4. A gas-lamp comprising a burner, tubes adapted to convey gas and air under pres sure to said burner, a globe surrounding said burner, a casing above said globe, an imperforate draft-divider above the zone of combustion and within said casing, an air-admission aperture in said casing in a plane intermediate the ends of said divider and a gasexit aperture from said casing substantially above said divider.

5. A gas-lamp comprising an incandescent burner, tubes adapted to convey gas and air under pressure to said burner, a globe closed except at its upper end surrounding said burner, a casing above said globe, an imperforate draft-divider substantially above the mantle of said burner and within said casing, an air-admission aperture in said casing in a plane intermediate the ends of said divider and a gas exit aperture in said casing substantially above said divider.

THOMAS GORDON.

Witnesses:

JOHN A. WIEDERSHEIM, GEO. L. COOPER. 

